Time of day

兩點

2:00
點 is considered a measure word, so 2:00 is always 兩點

十二點差兩分

2 minutes to 12
分 is also a measure word, especially when used with 差

兩點零二

2:02
Here the numbers are treated as digits, similar to "two-oh-two" in English.

兩點半

2:30

兩點一刻

2:15

差一刻三點

15 minutes to three
The 差 expression can come before or after the hour.

兩點四十五分

2:45

Asking about time

現在幾點（鐘)？

What time is it now?

星期幾?

What day of the week?

幾月幾號?

What date (month/day)?

Days and Weeks

Expressions such as 上星期一, 這星期天, 下星期三 apply to last week, this week and next week respectively, regardless of what day of the week today is.

上星期

last week

上星期一

Monday of last week

這星期

this week

這星期天

Sunday of this week

下星期

next week

下星期三

Wednesday of next week